Labeling of cerebral amyloid in vivo with a monoclonal antibody

Lary C. Walker, Donald L. Price, Mary Lou Voytko, Dale B. Schenk

Research output: Contribution to journalArticlepeer-review

Abstract

We assessed the ability of a murine monoclonal antibody to bind selectively to (3-amyloid in the brains of living nonhuman primates. To circumvent the blood-brain barrier, we injected unlabeled antibody 10D5 (murine whole IgG, and/or Fab fragments) into the cerebrospinal fluid of the cisterna magna in three aged monkeys. A control animal was given an intracisternal injection of nonimmune mouse whole IgG plus Fab. Twenty-four hours later, the animals were perfused and prepared for immunohistochemical detection of bound murine immunoglobulin in brain. All three experimental animals showed selective binding of 10D5 to approximately 5-15% of amyloid deposits in cerebral cortex, primarily near the cortical surface. There was no labeling in the control animal. In vi’vo-labeled deposits were confirmed to be (3-amyloid by electron microscopy and by in vitro immunohistochemistry in adjacent sections. The animals tolerated the injection well, although some polymorphonuclear leukocytes infiltrated portions of the subarachnoid space and superficial neocortex. These results provide the first demonstration that it may be feasible to selectively direct a tagged monoclonal antibody to (3-amyloid in the brain for therapeutic or diagnostic purposes. With enhancement of labeling efficiency, the method also may be useful for studying the progression of p-amyloidosis in experimental animals using emission tomography.

Original languageEnglish (US)
Pages (from-to)377-383
Number of pages7
JournalJournal of neuropathology and experimental neurology
Volume53
Issue number4
DOIs
StatePublished - Jul 1994

Keywords

  • Alzheimer’s disease
  • Blood-brain barrier
  • Cerebrospinal fluid
  • Cerebrovascular amyloidosis
  • Diagnosis
  • Drug delivery
  • Imaging

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Neurology
  • Clinical Neurology
  • Cellular and Molecular Neuroscience

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